We run a PAMM account at Vantage and it works very well.
I think it's a bit of an oversimplification to say that most PAMM accounts are scams or have bad results.
Our results are linked to the fact that we have large long-term investors who require strict money management and are happy with 40-50% yearly cumulative growth.
We could easily have opened 20 high-risk accounts and for sure one or two would have survived with insanely good results. But that is just not our way of trading. We don't sell products, we manage other people's hard-earned money.
When searching for a PAMM I recommend not only looking at results but also >1 year history, sharpe ratio above 0.15 and solid risk of ruin numbers.
Ask, and you will receive; seek, and you will find; knock, and it will be opened to you.